ja at jaa.org.uk
Wed Mar 3 13:06:11 UTC 2010
I have been following recent threads about the best way to clone/backup
"Risks of backing up live mounted filesystems using dump(8)"
I have just tested dump/restore using a System Rescue CD
using dump 0.4b42
The source /dev/sda7 is a fully working updated F12 / partition
The destination is a similar partition on the same disk /dev/sda9
mkfs -t ext3 /dev/sda9
mount /dev/sda9 /mnt/out
dump 0f - /dev/sda7 | (cd /mnt/out; restore -rf -)
40GB dump/restore took 46 minutes
I received 9 errors of the type
resync restore, skipped 1 blocks
error in EA block 1
magic = 0
Google tells me that dump saves as is
and that restore is finding an error in an Attribute Block
(maybe/sometimes associated with NFS)
I have not been able to find definitive answers to some obvious
1. Are these fatal for the file concerned hence invalidating the clone/backup?
I am unsure how to interpret the error message
2. Why are they present in the first place?
3. How can I find which files they are caused by?
4. Can I correct the errors, do I need to?
Grateful for any help
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